var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');

var app = express();
/**
 * 全系统允许跨域处理 这段配置要再new出express实例的时候就要设置了，放在所有的api前面，不然没有效果
 */

app.all('*', function (req, res, next) {
  //设置允许跨域的域名，*代表允许任意域名跨域
  res.header('Access-Control-Allow-Origin', '*');
  //允许的header类型
  res.header('Access-Control-Allow-Headers', '*');
  //跨域允许的请求方式
  res.header('Access-Control-Allow-Methods', '*');
  if (req.method.toLowerCase() == 'options') res.send(200);
  //让options尝试请求快速结束
  else next();
});

app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

/*引用session
 * */
let session = require('express-session');
/*
 *session配置
 * */
app.use(
  session({
    secret: 'keyboard cat',
    resave: false,
    saveUninitialized: true,
    //maxAge:最多可以存活多久
    cookie:
      ('name',
      'value',
      {
        maxAge: 5 * 60 * 1000,
        secure: false,
      }),
  }),
);
app.use(logger('dev'));
app.use(express.json());
app.use(
  express.urlencoded({
    extended: false,
  }),
);
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

/**
 * 定义全局的加解密密钥
 * @type {string}
 */
global.globalKey = '123456';
// let jwtUtil = require('./utils/jwtUtils');
// let redisUtils = require('./utils/redisUtils');

app.use('/', indexRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
